T[] GetCollisionObjectsFromAChild(Vector2 checkPoint, float checkRadius, QuadtreeData <T> child)
{
if (child._field.PointToFieldDistance(checkPoint) <= _maxRadius + checkRadius) //这里不光要考虑到检测半径，还要考虑到节点最大半径
{
return(child.DoCheckCollision(checkPoint, checkRadius));
}
return(new T[] { });
}
public T[] CheckCollision(Vector2 checkPoint, float checkRadius)
{
return(_root.DoCheckCollision(checkPoint, checkRadius));
}